Yesterday Phoronix showed proof of Steam's Linux client existence via its Mac OS X launcher that is currently in closed beta, then this morning they showed further signs of Linux support. Since 2008 it was known that Steam and the Source Engine would come to Linux. As an update, they even pointed out the download link for the Steam Linux binary from their store.

they may have an internal version of Linux that is similar in structure to OS X. Some companies will focus development on custom Linux VMs instead of Apple machines to reduce costs. Remember that it isn't legal to virtualize OS X on non-Apple hardware.

But Steam in Linux is possible especially if they only target Ubuntu but you really have to ask if it is worth the effort since games will have to be ported as well. How many Linux users already play Valve games in Windows or on the Xbox? Proprietary development is already sketchy enough in Linux and anything related to 3D or sound just compounds the problem.

I have to wonder if Gabe is pissed off at MS for ignoring pc gaming. MS would like all developers to move to consoles which cuts into Valve's profits. Even if the finances aren't there Gabe might support Linux to make a statement.